Grinding-machine.



PATENTBD DEC. 29, 190s.

A-. A.` BAKER. GRINDING MACHINE.

APPLIOATIDN FILED NOV. 28, 1902.

2 SHEETS-SEEET 1.

No MODEL.

No. 747,924. Y PATENTED DBG. 29, 190s. A. A. BAKER. GRINDING MACHINE.

APPLICATION FILED NOV. 28. 1902. .U0 MODEL. 2 SHEETS-SHEET 2.

UNITEDA STATES Patented December 29, 1903.

PATENT OFFICE.

' ALBERT A. BAKER, OF ANSONIA, CONNECTICUT, ASSIGNOR TO FARRELL FOUNDRYAND MACHINE COMPANY, OF ANSONIA, CONNECTICUT, A

CORPORATION F CONNECTICUT.

MACHINE.

SPECIFICATION forming part of Letters Patent No. 747,924, dated December29, 1903.

l Application filed Novemberv 28,1902. SerialNo. 133,678. (No model.)

.To all whom it may concern.:

Be it known that I, ALBERTA. BAKER, a'

i Icitizen of the United States, residing at An-A sonia, county of NewHaven, and State of-Connecticut, have invented certain new and usefulImprovements in Grinding Machines, fully described and represented inthe fol lowing specification and the accompanying drawings, forming-apart of the same.

This invention relates to certain improvements in grinding-machines.

grinding devices at the beginning of the movement of the carriage,giving the grinding de` vices as strong a cut as is possible. As thecarriage travelsalong the work, however, the grinding devices wear away.It follows, therefore, particularly in grinding long rolls, that thegrinding devices are not doing the proper amount of cutting toward theend of the movement of the carriage in each direction, since while thesedevices produce a comparatively deep-cut at thevv beginning of thestroke the cut decreases asV the travel of the carriage proceeds.r Theattendant is supposed t0 give the grinding devices such an adjustment atthe beginning of each stroke as tocause them to produce a cut which isdeep enough to compensate for the lightness of the cut at the end of thepreceding stroke. To give the proper adjustmentvof the wheels or othergrinding devices t0 produce; this compensating cut is an exceedinglydiflicult matter and requires great experience, and, furthermore, ingrinding work-such, for instance, as long cylinderssince the cutisdeeper as the grinding?y rollsbegin their cutthan it is toward thecenter of the stroke of the carriage it follows that a roll is apt to beground so that it will be of greater diameter in the center than at theends. This makes it necessary to shorten the stroke of the carriage andsubject the center of the roll to a separate operation inorder to bringthe diameter of it down to the diameter 0f the ends. Inasmuch as manyrolls necessarily have to be ground within a ten-thousandth of an inchthe proper adjustment of the grindingdevices to produce this separategrinding operation at the center of the roll is exceedingly delicate.

Itis the object of this invention to produce an improved grindingmechanism in which there is a relative movement between the work andthegrinding devices in order to present fresh parts Yof the work to saiddevices anrd Vin which an -automatic feedingl movement is producedbetween the grinding devices and the work to compensate for the in whicha relative feeding movement is proi duced between the grinding devicesandthe i work during the grinding operation to enable said devices toeffect a uniform cut during .the entire length of the workpresentingmovement.

With these and other objects `in view the i i invent-ion consists incertain vconstructions and in certain parts, improvements, andcombinations, as will be hereinafter fully described and thenspecifically pointed out in the claims hereunto appended.

In the accompanying drawings', Figure l is a plan View of the'machineembodying the invention. Fig. 2 is a side elevation ofjthe machine shownin Fig. l. Fig. Sis an end elevation, partly in section. Fig. 4 is adetail view, on a large scale, illustratingapart of the feeding meansfor the grinding devices. `Fig. 5 is a section on the line 5 5 of Fig.4. Fig. 6 lis a detail sectional elevation on the line 6 6 of Fig. 4.Fig. 7 is a detail view illustrating the construction of theypawlcarriers. v

In the drawings, which illustrate a preferred embodiment of theinvention, l indicates a supporting-bed. The bed is provided. with ways2, in which is mounted .a carriage,

said carriage comprising blocks 3, connected by a cross-web 4. Thiscarriage is a traveling carriage, and in the construction shown it isarranged to reciprocate.

'[he means for reciprocating the carriage may be of any preferredconstruction. As shown, the bed supports a feed screw 5, which isengaged by a feeding-nut 6, secured to the cross-web 4. The feedscrew isprovided at one end (see dotted lines in Fig. 2) with a gear-wheel 7,which is in mesh with a gear 8, mounted on a short shaft 9, suitablysupported in standards 10, rising from the bed. This short shaft isprovided with a clutch-collar 11, which is splined on the shaft and isarranged to engage the hubs of either of the two gears 12 13, which areloosely` mounted on the shaft. The gear 12 is in engagement with anintermediate 14, mounted on a stud projecting from one of the bearings10, said intermediate being in engagement with a gear 15. The gear 13 isin direct engagement with a gear 16. The gears 15 and 16 are mounted ona short shaft 17, which is supported in suitable bearings in thestandards 1 0. This shaft 17 has on its end a driving-pulley 18,although it may be driven in any other suitable manner. The shaft 17always runs in the same direction; but it is apparent that thefeed-screw will be rotated first in one direction and then in the other,according to whether the collar 11 is in engagement with the gear 12 orthe gear 13.

The means for controlling the position of the clutch-collar may be ofany suitable description. As shown, there is provided a short shaft 19,located in bearings 20, mounted on the bed, this shaft carrying aquadrant 21, which is fast on the shaft, said quadrant serving tosupport pins 22 and 23. Loosely mounted on the shaft 19 is a ball-lever24, to one arm of which is connected a sliding rod This rod passesthrough a perforation in the carriage (see Fig. 3) and is provided withtwo sliding collars 26, backed up by springs, as shown. As the carriagecompletes its movement in each direction it strikes one of the collars26 and shifts the rod. This operates the ball-lever, which is thrownagainst one or the other of the pins 22 23, thus rocking the quadrant ontheshaft 19.' There is a pin connection between the quadrant and theclutch-collar, which is not shown, so that the movement of the quadrantslides the collar and causes it to engage with either one or the otherof the hubs of the gears 12 13. The clutch which has just been describedis a well-known construction, and any other suitable form of clutchmechanism may be substituted for it.

The machine is provided with a suitable work-support and with suitablemeans for supporting a grinding device or devices, and the constructionis of course such that fresh parts of the work are being presented tothe grinding devices during the grinding operation. The construction bywhich the work is supported and the grinding devices are mounted so asto effect this presentation of the work to the grinding mechanism willvary according to the type or construction of the machine employed. In amachine of the type shown in the drawings, in which a reciprocatingcarriage is employed, either the worksupport or the grinding-devicesupport or supports may be mounted on the carriage, so that a traversingmovement may be effected between the work and the grinding devices.Furthermore, the construction by which the supports which are mounted onthe carriage are connected to the carriage is preferably of such adescription as to permit an adjustment between the carriage and the saidsupport to compensate for inequalities.

In the construction shown the grinding devices are mounted on thecarriage and the work-support is mounted on the bed. This work-support,which may be of any suitable character, consists of a pair of cross-bars27, which are bolted to the bed, and since the machine which has beenselected to illustrate the invention is intended for grinding rolls,these supports also are provided with bearings 28, in which the rollrests. These bearings are preferably provided with adjustingblocks 29,asis common in such constructions, so that the roll may be trued up in thebearings.

The means for supporting the grinding devices may be of any suitabledescription and will vary according to the construction of the machinein which the invention is embodied and according to the number andnature of the grinding devices employed. It has been before stated thatthe construction by which the grinding device or devices are mounted onthe carriage is of such a character as to permit a compensatingadjustment between the grinding device or devices and the carriage, andit may be further remarked that this construction also may be variedaccording to the particular machine in which the invention is embodied.As shown, there is provided a block 30, which extends across themachine, said block being supported on each side of the machine 4bypairs of hangers 31. The hangers 31 are supported-at their upper ends bycross-bars 32, said cross-bars being provided on their ends withknife-edges which engage suitably-formed recesses in the tops ofstandards 33, rising from the blocks 3, which form part of the carriage.These hangers 31 at their lower ends engage short knife-edge bearings34, (see Fig. 5,) mounted in recesses in the block 30. By thisconstruction the block 30 is enabled to have a swinging movement whichpermits the compensating adjustment before referred to.

The grinding devices,which, as shown, consist of wheels 35, may bemounted in any suitable manner. In the construction shown the machineisprovided with sliding heads 36,in which the wheels are mounted, therebeing in the type of machine which has been selected IIO to illustratethis invention two of these heads, one located on each side of the work.These heads are supported on the block 30 and preferably move in waystherein. The means for effecting the feeding movement of the slidingheads may be widely varied and will be varied according to the type ofmachine in which the invention is embodied. In the preferred form of theconstruction a controller will be employed which may also be of anysuitable construction. As shown, the controller consists of'an inclinedbar 37, and since the machine which has been selected to illustrate theinvention employs two grinding devices there will preferably be two ofthese bars, one on each side of the machine. These bars may bevmonntedin any suitable manner. In the construction shown these bars are pivotedon brackets 38, which are secured to the sides of the bed. In 'thepreferred form of the construction the bars will beso mounted as toenable them to be adjustable, so as to produce different depths of cut.As shown, this adjustment is effected by providing each end of each barwith a slot 39, which is engaged .by a screw 40, which is tapped into abracket 4l, secured to the bed.

gaged bya feedingscrew 43, journaled in an 1 extension of the head. Theouter end of each feed-'screw isl provided witha gear 44,

which engages with along pinion 45,support ed on a shaft 46, journaledin a bracket 46.

The inner ends of these shafts 46'areprovided with ratchet-wheels 47,and each shaft hasmounted thereon a pair of'pawl-carriers l 48,whosepawls 49 face in opposite directions.

Suitableconnections are provided by which the pawl-carriers are operatedfrom the controllers, these connections being preferably` of such acharacter that'one of the pawls will be operated on one stroke of thereciprocating carriage and the other -pawl Will be operated on the otherstroke of the reciprocat-' ing carriage.

Furthermore, these 'connections are preferably ilexible,so as toallowfor the compensating adjusting movement heretofore referred to astaking place between the carriage and the sliding heads through themedium of the swinging block 30. In the construction shown eachcontroller-bar is engaged by a pair of jointed sliding rods 50, whichmove in guides 51, secured to themachine-bed. The upper ends of theserods are pivoted at 51 to the pawl-carriers, andtheir lower ends areprovided with wheels 52,which` engage on opposite sides of ribs on thecontroller-bars. Y

The grinding-wheels may be driven in any suitable manner. As shown, eachof the shafts on which these wheels are mounted are feed beingcontrolled by the amount of in- 4 clination of the controller-bar. Onthe return stroke of the carriage the other sliding rod of` each pairoperates to tu rn the ratchetwheel in the same direction, thuscontinuing the feeding movement of the head toward the work. It isobvious that the feeding movement is entirely automatic and that byproperly adjusting the controller-bars the wearing away of thegrinding-wheels during the grinding operation can be compensated for sothat the wheels are enabled to produce a uniform cut. y

When the machine is employed for grinding rolls, the rolls will berotated during the grinding operation by means of a spindle 54, saidspindle being provided with a cap 55`of the usual construction. Thisspindle 54 is or may be made in two parts to enable it to be adjustableand is rotated from the shaft 17.

It will be understood that while the machinensh'own embodies a preferredform of the invention the in ven tionmay be embodied in machines whichAare widely diEerent in construction and operation. The invention is nottherefore to be limited to the specific construction which has beenhereinbefore described.

What is claimed is- I 1. In a grinding-machine, the combination with awork-support, of means for supporting the grinding device, means forcausing fresh parts of the work to be presented to the grinding device,and automatic means for producing a uniform advancing feeding movementbetween the work and the grinding device during the grinding operationto compensate for the wear of the grinding device, substantially asdescribed.

2.` In a grinding-machine, the combination with a Work-support, of meansfor supporting the grinding device, means for causing fresh parts-of thework to'be presented to the grinding device, and automatic means forfeeding the grinding device uniformly toward the work duringthe'grinding operation to compensate for the wear of the grindingdevice, substantially as described.

3. In a grinding-machine, the combination with a work-support, of agrinding device, means for causing fresh parts of the work to bepresented to the grinding device, a feedcontroller for positivelyfeeding the grinding device uniformly toward thework to'compensate forthe wear vof the grinding device,

IUO

and means for producing a relative traveling movement between thecontroller' and the grinding device during the grinding operation,substantially as described.

4. In a grinding-machine, the combination with a work-support, of agrinding-wheel, a carrier in which the wheel is mounted, means forreciprocating the carrier along the work, and means for positively andautomatically feeding the wheel uniformly toward the work to compensatefor the wear of the grinding device, substantially as described.

5. In a grinding-machine, the combination witha work-support, ofgrinding devices operating on opposite sides of the work, means forcausing fresh parts of the work to be presented to the grinding devices,and automatic means for feeding the grinding devices toward the work,substantially as described.

6. In agrinding-machine, the combination with a work-support, ofgrinding devices op erating on opposite sides of the work, means forcausing fresh parts of the work to be presented to the grinding devices,and automatic means for feeding the grinding devices toward the workduring the grinding operation, substantially as described.

7. In a grinding-machine, the combination with a traveling carriage, ofmeans for supporting the work, means for supporting a grinding device,one of said supporting means being mounted on the carriage, means forpermitting an adjustment between the carriage and the supporting meansmounted thereon, and automatic means for producing a relative feedingmovement between the work and the grinding devices, substantially asdescribed.

8. In a grinding-machine, the combination with a traveling carriage, ofmeans for supporting the work, means for supporting a grindingdevice,one of said supporting means being mounted on the carriage, meansfor permitting an adjustment between the carriage and the supportingmeans mounted thereon, and automatic means for producing a relativefeeding movement between the work and the grinding devices during thegrinding operation, substantially as described.

9. In a grinding-machine, the combination with a traveling carriage, ofa work-support, grinding devices operating on opposite sides of thework, said devices being mounted on the carriage, means for permittingan adjustment between the grinding devices and the carriage, and meansfor automatically feeding the grinding devices toward the work,substantially as described.

10. In a grinding-machine,the combination with a traveling carriage, ofa work-support, grinding devices operating on opposite sides of thework, said devices being mounted on the carriage, means for permittingan adjustment between the grinding devices and the carriage, and meansfor automatically feeding the grinding devices toward the work duringthe grinding operation, substantially as described.

11. In agrinding-machine,the combination with a work-support, of meansfor supporting the grinding device, means for producing a relativemovement between the work and the grinding device whereby fresh parts ofthe work are-presented to the grinding device, a controller, andconnections whereby the controller produces an automatic feedingmovement between the work and the grinding devices during the grindingoperation, substantially as described.

l2. In a grinding-machine, the combination with a work-support, ofgrinding devices operating on opposite sides of the work, means forproducing a relative movement between the work and the grinding deviceswhereby fresh parts of the work are presented to the grinding devices,controllers for said grinding devices, and connections between eachcontroller and its grinding device whereby the controllers feed thegrinding devices toward the work during the grinding operation,substantially as described.

13. In a grinding-machine, the combination with a bed, of atravelingcarriage mounted thereon, means for supporting the work and means forsupporting the grinding devices, one of said supporting means beingmounted on the carriage, means for permitting an adjustment between thecarriage and the supporting means mounted thereon, a controller, andmeans including iiexible connections between the controller and thesupporting means on the carriage, whereby the controller produces anautomatic feeding movement between the work and the grinding devicesduring the feeding operation, substantially as described.

14. In a grinding-machine, the combination with a bed, of a travelingcarriage, means on the carriage for supporting the grinding devices,said means permitting an adjustment between the carriage and saidgrinding devices, a controller mounted on the bed, and meansincludingflexible connections between the controller and thegrinding-device-supporting means, whereby the grinding devices areautomatically fed toward the work during the grinding operation,substantially as described.

15. In agrinding-machine, the combination with a bed, of a travelingcarriage, work-supporting means, grinding devices operating on oppositesides of the work, means for supporting the grinding devices on thecarriage, said means being constructed to permit an adjustment betweenthe carriage and said grinding devices, controllers mounted on the bed,and means including flexible connections between the controllers and thegrinding devices whereby the grinding devices are fed toward the workduring the grinding operation, substantially as described.

16. In a grinding-machine, the combination with a bed, of awork-support, a traveling carriage, a grinding device supported thereon,a controller-bar, and connections between the IOO IIO

`on each stroke of the carriage, substantially as described.

18. In a grinding-machine, the combination v with a traveling carriage,of grinding devices operating on opposite sides of thework, slidingheads mounted in the carriage on which the grinding devices aresupported, controller-bars, and connections'including suitable gearingbetween the bars and the heads, whereby the sliding heads carryingthe'grind- `ing devices are fed toward the work during the grindingoperation, substantially as described.

f 19. In a grin ding-machine, the combination with a bed, of areciprocating carriage,a worksupport, sliding heads mounted in thecarriage and located on opposite sidesof the work-support, grindingdevices supported in the heads, a pair of controller-bars located onopposite sides of the bed, and connections between each controller-barand its corresponding head wherebythe .heads and the grinding devicesmounted thereon are feld toward the work during. each stroke of thecarriage, substantially as described.

20. In a grinding-machine, the combination Awith a bed, of areciprocating carriage, a

grinding device mounted in the carriage, a controller, and meansincluding-two sets of connections for feeding the grinding device towardthe work during the grinding operation, one set of connections beingoperativel on one stroke of the vcarriage and the other set beingoperative on the other stroke of the carriage, substantially asdescribed.

2l. In agrinding-machine,-the combination A' with a bed, of atravelingcarriage, Work-supwith a bed, of a traveling carriage, work-sup;

porting means and grinding-devicesu-pportj porting means andgrinding-device-supporting means, one of said means being mounted on thecarriage, an inclined controller-bar,

vand connections between the controller-bar and the supporting meansmounted on the carriage whereby a relative feeding movement is producedbetween the work and the grinding device during the grinding operation,subst'antially'as described.

22. In agrinding-machine, thelcombination ing means, one of said meansbeing mounted on the carriage, an inclined controller-bar, means foradjusting the inclination of the bar, and connections between thecontrollerbar and the supporting means mounted on the carriage whereby arelative feeding movement is produced between the work and the grindingdevice during the grinding operation, substantially as described.

23. In a grinding-machine,`the combination with a reciprocatingcarriage, work-supporting means and grinding-device-supporting means,one ofsaidmeans being mounted on the carriage, a controller-bar, andmeans in-A cluding two sets of connections for producing a relativefeeding movement between the grinding-device-supporting means and thework-supporting means, one of said sets of 'connections being operativeon each 'stroke vof the carriage, 'substantially as described.

24. lIn agrinding-machine, the combination withl a traveling carriage,of a work-support, grinding devices operating on opposite sides o f thework, means for supporting said grinding devices on the carriage, saidsupporting means permitting an adjustment between the grinding devicesand the carriage, an inclined controller-bar for each grinding device,means including flexible connections between each controller-bar and thecorresponding device, supporting means `whereby the controller-bars feedthe grinding devices toward the work during the grinding operation, andmeans for adjusting the inclination of the controller-bars,substantially as described.

25. In agrindin'g-machine, the combination with a bed, of a work-supportmounted thereon, a carriage, means for reciprocating the carriageon thebed, grinding-de'vice-snpportingheads mounted -on opposite sides o f thework, controller-bars, feeding devicesop'er- 4ating on thesupporting-heads, and two sets of connections between each feedingdevice and its controller-bar, whereby the control- 1er-bars feed thesupporting-headstoward ythe work during the grinding operation, one

set of connections being operative on each -stroke of the carriage,substantially as described.A Y I 26. In a grinding-machine, thecombination with abed, of a work-support mounted there- -on, a carriage,means forreciprocating the'.

carriage on thebed, gri riding-device-su pporting heads mounted onopposite sides of the work, inclined controller-bars, means for ad-,.

justing the inclination' of the bars, feeding devices operating on thesupporting-heads, and .two sets of connections between each .feedingdevice and its controller-bar, wherebythe controller-bars feed `thesupportingheads toward the work during the grinding operation, -one setof connections being operative on each stroke of the carriage,substantially as described.

27. In aA grinding-machine,the combination with a bed, of a work-supportmounted there-iv on, a carriage, means forreciprocating the carriage,heads for supporting the grinding devicesmounted on the carriage andlocated on opposite sides of -the work, a controllerbar for each head, aratchet-wheel for each head, means whereby'the ratchet-wheels pro- IOStgo

duce a feeding movement of the heads, apair of pawl-carriers for eachratchet-wheel whose pawls face in opposite directions, and twopawl-carrier-operating rods said rods being in engagement with thecontroller-bars of their respective heads, substantially as described.

28. In agrinding-machine,the combination with abed, of a work-supportmounted thereon, a carriage, means for reciprocating the carriage, headsfor supporting the grinding devices mounted on the carriage and locatedon opposite sides of the work, an inclined controller-bar for each head,means for adjusting the inclination of the bars, a ratchet- Wheel foreach head, means whereby the ratchetwheels produce a feeding movement ofthe heads, a pair of pawl-carriers for each ratchet-wheel whose pawlsface in opposite directions, and two pawl-carrier-operating rods saidrods being in engagement with the controller-bars of their respectiveheads, substantially as described.

29. In agrnding-machine, the combination with a bed, of a work-support,acarriage, means for reciprocating the carriage on the bed, sliding headsfor supporting the grinding devices located on opposite sides of theWork, means for su pporting said heads on the carriage, said supportingmeans being constructed to permit an adjustment between the heads andthe carriage, feeding devices for moving each head toward the work, aratchet-wheel for operatingeach feeding device, a pair of pawi-carrierswhose pawls face in opposite directions cooperating with each of saidratchet-wheels, a pair of controllerbars one for each head located onopposite sides of the bed, sliding rods for each pawl-v carrier saidrods being flexibly connected to said pawl-carriers and being inengagement with the controller-bars, substantially as described.

30.V In a grinding-machine, the combination with a bed, of awork-support, a carriage, means for reciprocating the carriage on thebed, sliding heads for supporting the grinding devices located onopposite sides of the work, means for supporting said heads on thecarriage, said supporting means being constructed to permit anadjustment between the heads and the carriage, feeding devices formoving each head toward the work, a ratchet-wheel for operating eachfeeding device, a pair of pawl-carriers whose pawls face in oppositedirections cooperating with each of said ratchet-Wheels, a pair ofinclined controller-bars one for each head located on opposite sides ofthe bed, means for adjusting the inclination of the bars, and slidingrods for each pawl-carrier said rods being flexibly connected to saidpawlcarriers and being in engagement with the controller-bars,substantially as described.

31. In a grinding-machine, the combination with abed, ot' awork-support, a reciprocating carriage, a swinging block mounted on thecarriage, grinding devices mounted on the block and operating onopposite sides of the work, and means for feeding the grinding devicestoward the work during the grinding operation, substantially asdescribed.

32. In a grinding-machine,the combination with a bed, of a work-support,a reciprocating carriage, a swinging block mounted on Ythe carriage,sliding heads mounted in the block and located on opposite sides of thework, grinding-wheels mounted in the heads, controller-bars for feedingthe heads toward the work duringthe grinding operation, and Ilexibleconnections between the controller-bars and the heads, substantially asdescribed.

33. In agrinding-machi'ne,the combination with a bed, of a work-support,a reciprocating carriage mounted thereon, a swinging block mounted onthe carriage,slidingheads mounted in the block and located on oppositesides of the work, feed-screws for moving the heads toward the work,gearing for operating the screws, controller-bars mounted on the bed,and means flexibly connected with the controller-bars for operating thegearing to feed the heads toward the work during the grinding operation,substantially as described.

34. In agrinding-machine, the combination with a bed, ofawork-support, areciprocating carriage mounted thereon, a swinging block mounted on thecarriage,sliding heads mounted in the block and located on oppositesides of the work, feed-screws for moving the heads toward the work,gearingincluding a ratchetwheel for each head, a pair of pawl-carriersfor each ratchet-wheel whose pawls face in opposite directions, inclinedcontroller-bars, means for adjusting the inclination of the bars, andsliding operating-bars in engagement with the controller-bars foroperating the pawl-carriers, said rods being iiexibly connected to thepawl-carriers, substantially as described.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

ALBERT A. BAKER.

Witnesses:

ALTON FARREL, CHARLES F. BLIN.

IOO

IIO

